EP1819568A1 - Verfahren zum regeln eines druckluftversorgungssystems eines kraftfahrzeugs - Google Patents
Verfahren zum regeln eines druckluftversorgungssystems eines kraftfahrzeugsInfo
- Publication number
- EP1819568A1 EP1819568A1 EP05793851A EP05793851A EP1819568A1 EP 1819568 A1 EP1819568 A1 EP 1819568A1 EP 05793851 A EP05793851 A EP 05793851A EP 05793851 A EP05793851 A EP 05793851A EP 1819568 A1 EP1819568 A1 EP 1819568A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- compressed air
- pressure
- motor vehicle
- air system
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/02—Arrangements of pumps or compressors, or control devices therefor
Definitions
- the invention relates to a method for controlling a compressed air supply system of a motor vehicle, the system comprising a drive motor, which is the motor vehicle drive motor, d. H. to
- Traveling of the motor vehicle is used, also an air compressor, which feeds a compressed air system of the vehicle, and in particular a hydrodynamic coupling, which is connected in the drive connection between the drive motor and the air compressor.
- the hydrodynamic coupling can be filled and emptied, so as to switch the air compressor on and off, depending on the pressure state in the compressed air system.
- the air compressor is designed in particular as a reciprocating air compressor.
- Compressed air supply systems as they relate to the invention, have the advantage that on the one hand an energetically favorable switching off the air compressor is possible by the intermediate hydrodynamic coupling, if a supply of the vehicle compressed air system due to a sufficient pressure level in this is not necessary by the hydrodynamic coupling "simple On the other hand, by the interposition of the hydrodynamic coupling between the drive motor and the
- Boundary conditions are, for example, the driving of the vehicle relative to the stationary state of the vehicle, the route profile, which just travels the vehicle, such as uphill or downhill driving, and different pressure conditions in the compressed air supply system of the vehicle called, for example, above a maximum allowable pressure, below the minimum allowable pressure and below a so-called release pressure, in which the spring accumulator is released in the vehicle brake system and below which the vehicle may not drive, called.
- Air compressor is also driven by the drive motor of the vehicle, the required power consumption of the air compressor is no longer to drive the vehicle available, the vehicle continues to lose speed.
- the invention has for its object to represent a method for controlling a compressed air supply system described above, which contributes to an energetically favorable driving of the vehicle.
- compressed air supply system in the context of the present invention describes the system arranged in the motor vehicle, by means of which compressed air is pumped into the vehicle compressed air system as needed. This pumping takes place by means of an air compressor, which is designed for example as a reciprocating air compressor, and which is driven by the drive motor of the motor vehicle.
- a first switching arrangement of the air compressor is constantly driven by the drive motor of the motor vehicle, and the air discharge side of the air compressor is connected as needed to the compressed air system of the vehicle, namely, if due to a detected pressure drop in the compressed air system, a feed is assessed as necessary.
- the state in which the air compressor feeds into the compressed air system is referred to in the context of the present invention as a feed state. If it is determined due to the detected pressure conditions in the compressed air system that the feed is to be terminated, is switched to the non-feed state, that is, a further feed of compressed air into the compressed air system by means of the air compressor is suppressed.
- this prevention occurs in that the connection between the air discharge side of the air compressor and the compressed air system is interrupted, so that the air compressor feeds, for example, into the environment.
- the air compressor is always driven only when an injection is to take place in the compressed air system.
- the air delivery side may, but need not, be permanently connected to the compressed air system of the vehicle.
- An on and off of the air compressor is advantageously carried out by means of a hydrodynamic coupling, which is arranged in a drive connection between the drive motor and the air compressor.
- two switching pressure values are preset, namely a first switching pressure value, which could also be referred to as the lower switching pressure value, in which a switching to the feed state, and a second switching pressure value, which could also be referred to as upper switching pressure value, in which a switch to the non-feed state he follows.
- the pressure in the compressed air system is compared with the at least one switching pressure value or advantageously with all switching pressure values, and depending on this comparison, the setting of the feed state or the setting of the non-feed state. If, for example, if two switching pressure values are specified, the pressure in the compressed air system is the first lower one
- Switching pressure value is reached or fallen below, is switched to the supply state, and when the pressure in the compressed air system reaches or exceeds the second upper switching pressure value, is switched to the non-feeding state.
- the topography of the route that is to say the height profile of the path covered or to be traveled by the vehicle.
- This topography acquisition can be done either by providing the topography in a storage medium that is read out, or it can be done, for example, by using a navigation system, as is well known to those skilled in the art, to navigate the driver to a selected destination ,
- the detected topography of the route on which the motor vehicle moves comprises the route profile which the motor vehicle has to travel within a predefined imminent time span and / or within a predefined imminent route at a predetermined destination. In other words, it is determined which route the motor vehicle will travel in the event of a further journey, given its current, actual position on the recorded topography. For example, if it is detected that the vehicle is currently half way through a continuous climb, then the route profile included in said topography includes, for example, the second half of that climb.
- the switching pressure value according to the invention or the switching pressure values as a function of which the supply state or the non-feeding state is set, is determined as a function of the detected topography and in particular as a function of said route profile included in the topography, which the motor vehicle will travel to after its current position, certainly.
- Figure 1 is a schematic representation of a controlled according to the invention compressed air supply system
- Figure 2 is a schematic diagram illustrating the movement of a motor vehicle on a route and the topography detected for this purpose
- Figure 3 shows an embodiment for the determination of two
- FIG. 1 shows the drive motor 1 of a motor vehicle, which can be switched into a drive connection 2 with an air compressor 3 by filling a hydrodynamic coupling 4 with working medium, in particular with oil from the engine oil circuit.
- the air compressor 3 feeds, when it is driven by the drive motor 1, that is, when the inventive method switches to the feed state, via its air discharge side 3.1 in the compressed air system 5 of the motor vehicle.
- a switchable and / or controllable throttle 6 is introduced in the compressed air-carrying line on the air discharge side 3.1, that is in the line which connects the air compressor 3 with the compressed air system 5 in an air-conducting manner.
- This throttle serves, according to an advantageous embodiment of the method according to the invention, the back pressure, against which
- Air compressor 3 promotes to increase targeted by throttling the promoted air flow when as much drive power from the drive motor 1 is to be transmitted to the air compressor 3 in the braking operation of the motor vehicle.
- a shut-off valve (not shown) may be arranged, which interrupts the flow of air from the air compressor 3 in the compressed air system 5 and to a continuous increase in pressure of the back pressure, against which the pressure compressor 3 promotes leads, to a maximum allowable pressure the air compressor 3 is achieved, in which, for example, a pressure relief valve (not shown) opens and compressed air is discharged accordingly.
- Delivery side of the air compressor 3 will naturally adjust depending on the storage capacity of the downstream side of the air compressor 3 a rapid increase in pressure, since this process is comparable to the filling of a pressure vessel. Accordingly, the throttling of the conveyed air flow is preferred to a complete shut-off, since thus despite a
- This targeted increase in pressure of the back pressure against which promotes the air compressor 3 is set exactly when the motor vehicle moves down a hill or a slope. This ensures that the power consumption of the air compressor 3 is increased, so that it subtracts corresponding drive power from the drive motor, which leads to a braking of the drive motor and thus relieves the parking brakes of the vehicle.
- the fact that the drive motor is in a downward movement of the motor vehicle in overrun, can be achieved by the additional Power consumption of the air compressor pushes against a higher torque and thus is pressed in its speed.
- FIG. 2 shows a vehicle 10, which is currently driving up an incline.
- the height profile of the entire route shown is included in the detected topography 11.
- the route profile 12 is included separately in the topography 11, which will cover the motor vehicle 10 due to its current position in his onward journey in the immediate port.
- an assessment can be made that a permanent braking in a limited upcoming period or in a limited upcoming to be traveled route is not expected. Only when reaching the end of the drawn route profile 12 follows a gradient, which will drive down the motor vehicle 10, so that then a permanent braking is to be expected and should be taken to ensure that enough compressed air in the compressed air system 5 is available for this braking.
- FIG. 3 shows a schematic diagram, on the abscissa of which the course of travel of the motor vehicle is shown, and on whose ordinate the pressure 25 in the compressed air system 5, the dynamically and variably set switching pressure values 20, 30, different pressure limits 22 to 24 and 32 to 33 and limit ranges 21, 31 for the switching pressure values 20, 30 are shown.
- the abscissa is denoted by “s” as an abbreviation for the passing distance and the ordinate by "p" for the pressure.
- N for normal travel, that is, a route without permanent gradients or gradients
- U for upward travel (Up)
- D for a downward travel (Down)
- the vehicle initially moves on a normal route, that is, on a route without sustained climbs or Downs.
- a normal route that is, on a route without sustained climbs or Downs.
- sustained increases or decreases which lead to a classification of the associated route profile outside a normal drive ("U" or "D"), by taking a limit value for a slope value and a limit for a route length within which the slope value is not exceeded
- the slope value indicates slope in a positive percentage and 100% slope corresponds to 45 degree slope angle.
- each route profile can accordingly be classified into a normal route (N), a downhill section or a descent (D) and an uphill section or a climb (U).
- a first switching pressure value 20 is set to a "usual" minimum pressure in the compressed air system 5.
- This usual minimum pressure is in a predetermined first pressure range 21 with a lower limit 22 and an upper limit 23, precisely at the arithmetic mean 24 between the lower limit 22 and the upper limit 23.
- the pressure 25 in the compressed air system 5 now drops due to the supply of one or more Lucasmonem and the first switching pressure value 20th is reached, is switched to the feed state, so that the air compressor 3 pumps in compressed air into the compressed air system 5. Accordingly, the pressure 25 in the compressed air system 5 increases, as shown by the curve in the left portion of Figure 3, behind the point at which the first Once the switching pressure value 20 has been reached, can recognize.
- a second switching pressure value 30 is predetermined, which corresponds to an upper limit value for the pressure 25 in the compressed air system 5 for the currently covered normal distance.
- This upper limit value can be set within a predetermined second pressure range 31, wherein this second pressure range 31 naturally has a substantial, predetermined distance from the first pressure range 21.
- the pressure 32 is a "normal" upper limit pressure for the compressed air system 5, wherein in special driving situations, which will be described later, for certain periods of an excessive pressure 33, namely the upper limit value 33 of the second pressure range 31 in the compressed air system 5 is allowed.
- the feed state switches to the non-feed state, so that due to the consumption of air by the consumer or consumers, the pressure 25 in the compressed air system 5 drops again following the changeover until it again reaches the first switching pressure value 20 reached, which again comes to a switch to the power state, etc.
- the vehicle now moves up a slope, and is determined by a performed automatic assessment of the route profile 12 that at least, as long as the vehicle moves on this route profile 12, no permanent braking is expected, which a corresponding supply of compressed air in the compressed air system 5 necessary makes, is allowed that the pressure 25 in the compressed air system 5 drops to a reduced minimum pressure.
- switching on the air compressor 3 is delayed and thus avoided for at least a certain period of time that the drive motor 1, which is already heavily burdened by the movement of the motor vehicle 10 up the hill, is additionally burdened by the drive of the air compressor 3, resulting in a Dropping the speed of the vehicle 10 would result.
- the first shift pressure value 20 is set to the lower limit value 22 of the predetermined first pressure range 21, as seen from the curve in FIG. 3 in the range "U".
- the vehicle 10 moves again on a normal route, so that the first switching pressure value 20 is again set to the value 24 and the second switching pressure value 30 is set to the value 32 again.
- the vehicle 10 moves down a slope (section "D"), and the adjustment of the two switching pressure values 20 and 30 takes place such that an increased wear-free braking effect is exerted on the drive motor 1 by a power-intensive drive of the air compressor 3 3, namely, when the vehicle is moving down a slope (see the section "D"), the first shift pressure value 20 is set to the lower limit value 32 of the second predetermined pressure range 31, while the second shift pressure value 30 is set to the upper one Limit value 33 of the second predetermined pressure range 31 is set.
- driving-specific data are evaluated for the evaluation of the route profile 12, wherein these driving-specific data have been recorded and stored on past journeys of the motor vehicle 10 on the same route or a route similar to the topography.
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Vehicle Body Suspensions (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004059834A DE102004059834A1 (de) | 2004-12-10 | 2004-12-10 | Verfahren zum Regeln eines Druckluftversorgungssystems eines Kraftfahrzeugs |
PCT/EP2005/010861 WO2006061056A1 (de) | 2004-12-10 | 2005-10-08 | Verfahren zum regeln eines druckluftversorgungssystems eines kraftfahrzeugs |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1819568A1 true EP1819568A1 (de) | 2007-08-22 |
EP1819568B1 EP1819568B1 (de) | 2011-03-02 |
Family
ID=35447602
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05793851A Expired - Fee Related EP1819568B1 (de) | 2004-12-10 | 2005-10-08 | Verfahren zum regeln eines druckluftversorgungssystems eines kraftfahrzeugs |
Country Status (8)
Country | Link |
---|---|
US (1) | US8162620B2 (de) |
EP (1) | EP1819568B1 (de) |
JP (1) | JP2008522885A (de) |
KR (1) | KR20070089738A (de) |
CN (1) | CN101018697A (de) |
DE (2) | DE102004059834A1 (de) |
RU (1) | RU2007125973A (de) |
WO (1) | WO2006061056A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008004807B4 (de) * | 2007-02-07 | 2012-10-31 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Druckluftversorgungsanlage und Verfahren zum Betreiben einer Druckluftversorgungsanlage |
DE102008026023A1 (de) * | 2008-05-30 | 2009-12-03 | Voith Patent Gmbh | Antriebsstrang und Verfahren zum Versorgen eines Druckluftsystems |
DE102008026028A1 (de) * | 2008-05-30 | 2009-12-03 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Kompressorsystem und Verfahren zum Betreiben eines Kompressorsystems |
DE102008056322A1 (de) | 2008-11-07 | 2010-05-12 | Wabco Gmbh | Steuereinrichtung für eine Druckluftaufbereitungseinrichtung eines Fahrzeuges, Druckluftaufbereitungseinrichtung sowie Verfahren zu deren Steuerung |
WO2011077404A2 (en) * | 2009-12-24 | 2011-06-30 | Iveco S.P.A. | Device and method for handling a pneumatic braking system compressor, in particular for industrial vehicles |
EP2338756A1 (de) * | 2009-12-24 | 2011-06-29 | Iveco S.p.A. | Vorrichtung und Verfahren zur Steuerung des Kompressors eines pneumatischen Bremssystems, insbesondere für Lastkraftwagen |
KR101428266B1 (ko) * | 2012-12-10 | 2014-08-07 | 현대자동차주식회사 | 고도정보를 이용한 eapu 제어 장치 |
KR102142294B1 (ko) * | 2014-11-11 | 2020-08-07 | 현대자동차주식회사 | Ams를 이용한 차량의 공기공급시스템 및 제어방법 |
DE102014118265A1 (de) * | 2014-12-10 | 2016-06-16 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Verfahren und Vorrichtung zur Druckluftversorgung eines Fahrzeugs |
DE102017114325A1 (de) | 2016-07-06 | 2018-01-11 | Voith Patent Gmbh | Verdichtereinheit für Kraftfahrzeuge |
US20220325714A1 (en) * | 2019-09-30 | 2022-10-13 | Volvo Truck Corporation | Method for controlling the rotational speed of an electric motor driven compressor and control unit adapted to perform the method |
CN111120287B (zh) * | 2019-12-30 | 2022-04-26 | 潍柴动力股份有限公司 | 空压机控制方法、系统和存储介质 |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
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US1709871A (en) * | 1928-01-01 | 1929-04-23 | Westinghouse Air Brake Co | Pressure governor |
JPS5812861A (ja) * | 1981-07-17 | 1983-01-25 | Diesel Kiki Co Ltd | 自動車用エア配管系の圧力制御装置 |
US5839534A (en) * | 1995-03-01 | 1998-11-24 | Eaton Vorad Technologies, Llc | System and method for intelligent cruise control using standard engine control modes |
DE19624978A1 (de) * | 1996-06-22 | 1998-01-02 | Manfred Max Rapp | Brennkraftmaschine für Kraftfahrzeuge |
DE19747265B4 (de) * | 1997-10-25 | 2010-11-04 | Zf Friedrichshafen Ag | Hybridantrieb für ein Fahrzeug |
DE19807291A1 (de) * | 1998-02-20 | 1999-08-26 | Volkswagen Ag | Verfahren zum Betreiben eines Kraftfahrzeuges mit einem Hybridantrieb |
US6036449A (en) * | 1998-03-24 | 2000-03-14 | Cummins Engine Company, Inc. | Air compressor control |
US5921883A (en) * | 1998-05-18 | 1999-07-13 | Cummins Engine Company, Inc. | System for managing engine retarding torque during coast mode operation |
DE19848544C1 (de) * | 1998-10-22 | 2000-06-21 | Voith Turbo Kg | Verfahren und Vorrichtung zur Erhöhung der Bremsmomentenausnutzung eines hydrodynamischen Retarders in einem Kraftfahrzeug |
DE19937381A1 (de) * | 1999-08-07 | 2001-03-22 | Daimler Chrysler Ag | Kraftfahrzeug mit Hybridantrieb und Verfahren zum Betrieb eines Kraftfahrzeugs mit Hybridantrieb |
FR2835787B1 (fr) * | 2002-02-14 | 2004-10-22 | Renault Vehicules Ind | Procede de pilotage d'un compresseur entraine par le moteur d'un vehicule |
AUPS300902A0 (en) * | 2002-06-18 | 2002-07-11 | Permo-Drive Research And Development Pty Ltd | Decoupling mechanism for hydraulic pump/motor assembly |
US6672060B1 (en) * | 2002-07-30 | 2004-01-06 | Ford Global Technologies, Llc | Coordinated control of electronic throttle and variable geometry turbocharger in boosted stoichiometric spark ignition engines |
SE522837C2 (sv) * | 2002-08-28 | 2004-03-09 | Claes Dahlstroem | Tryckluftsanläggning för ett motorfordon |
JP4348934B2 (ja) * | 2002-09-25 | 2009-10-21 | アイシン・エィ・ダブリュ株式会社 | 車両のサスペンション制御装置 |
US20040122580A1 (en) * | 2002-12-23 | 2004-06-24 | Sorrells Giles K. | Method and apparatus for determining road conditions |
-
2004
- 2004-12-10 DE DE102004059834A patent/DE102004059834A1/de not_active Withdrawn
-
2005
- 2005-10-08 US US11/721,288 patent/US8162620B2/en active Active
- 2005-10-08 JP JP2007544746A patent/JP2008522885A/ja active Pending
- 2005-10-08 WO PCT/EP2005/010861 patent/WO2006061056A1/de active Application Filing
- 2005-10-08 CN CNA2005800304858A patent/CN101018697A/zh active Pending
- 2005-10-08 KR KR1020077015792A patent/KR20070089738A/ko not_active Application Discontinuation
- 2005-10-08 EP EP05793851A patent/EP1819568B1/de not_active Expired - Fee Related
- 2005-10-08 RU RU2007125973/11A patent/RU2007125973A/ru unknown
- 2005-10-08 DE DE502005011053T patent/DE502005011053D1/de active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2006061056A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20080206070A1 (en) | 2008-08-28 |
EP1819568B1 (de) | 2011-03-02 |
RU2007125973A (ru) | 2009-01-20 |
DE502005011053D1 (de) | 2011-04-14 |
US8162620B2 (en) | 2012-04-24 |
DE102004059834A1 (de) | 2006-06-14 |
JP2008522885A (ja) | 2008-07-03 |
CN101018697A (zh) | 2007-08-15 |
WO2006061056A1 (de) | 2006-06-15 |
KR20070089738A (ko) | 2007-08-31 |
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